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[PULL 36/39] linux-user: Bound mmap_min_addr by host page size
From: |
Richard Henderson |
Subject: |
[PULL 36/39] linux-user: Bound mmap_min_addr by host page size |
Date: |
Thu, 22 Feb 2024 10:43:20 -1000 |
Bizzarely, it is possible to set /proc/sys/vm/mmap_min_addr
to a value below the host page size. Fix that.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: Helge Deller <deller@gmx.de>
Message-Id: <20240102015808.132373-32-richard.henderson@linaro.org>
---
linux-user/main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/linux-user/main.c b/linux-user/main.c
index 12bb839982..551acf1661 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -901,7 +901,7 @@ int main(int argc, char **argv, char **envp)
if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
unsigned long tmp;
if (fscanf(fp, "%lu", &tmp) == 1 && tmp != 0) {
- mmap_min_addr = tmp;
+ mmap_min_addr = MAX(tmp, host_page_size);
qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n",
mmap_min_addr);
}
--
2.34.1
- [PULL 26/39] linux-user: Split out mmap_h_eq_g, (continued)
- [PULL 26/39] linux-user: Split out mmap_h_eq_g, Richard Henderson, 2024/02/22
- [PULL 27/39] linux-user: Split out mmap_h_lt_g, Richard Henderson, 2024/02/22
- [PULL 28/39] linux-user: Split out mmap_h_gt_g, Richard Henderson, 2024/02/22
- [PULL 30/39] tests/tcg: Extend file in linux-madvise.c, Richard Henderson, 2024/02/22
- [PULL 29/39] tests/tcg: Remove run-test-mmap-*, Richard Henderson, 2024/02/22
- [PULL 31/39] *-user: Deprecate and disable -p pagesize, Richard Henderson, 2024/02/22
- [PULL 32/39] cpu: Remove page_size_init, Richard Henderson, 2024/02/22
- [PULL 33/39] accel/tcg: Disconnect TargetPageDataNode from page size, Richard Henderson, 2024/02/22
- [PULL 34/39] linux-user: Allow TARGET_PAGE_BITS_VARY, Richard Henderson, 2024/02/22
- [PULL 35/39] target/arm: Enable TARGET_PAGE_BITS_VARY for AArch64 user-only, Richard Henderson, 2024/02/22
- [PULL 36/39] linux-user: Bound mmap_min_addr by host page size,
Richard Henderson <=
- [PULL 37/39] target/ppc: Enable TARGET_PAGE_BITS_VARY for user-only, Richard Henderson, 2024/02/22
- [PULL 38/39] target/alpha: Enable TARGET_PAGE_BITS_VARY for user-only, Richard Henderson, 2024/02/22
- [PULL 39/39] linux-user: Remove pgb_dynamic alignment assertion, Richard Henderson, 2024/02/22
- Re: [PULL 00/39] tcg and linux-user patch queue, Peter Maydell, 2024/02/23